mysql分组查询累计数量
时间: 2023-10-18 10:31:56 浏览: 59
在MySQL中,如果要进行分组查询并计算累计数量,可以使用窗口函数和分区语句。如果你使用的是MySQL 8.0以上的版本,可以使用窗口函数sum与partition by进行组合计算。下面是一个示例查询语句:
```sql
SELECT userid, date,
SUM(order_count) OVER (PARTITION BY userid ORDER BY date) AS 累计
FROM order_list
```
这个查询语句会按照userid对数据进行分组,并按照date进行排序。然后使用窗口函数SUM进行累计求和,通过PARTITION BY userid指定每个userid作为一个分区。最终结果会返回每个userid在每个date下的累计数量。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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